The Pearl String project is located in Mineral County, Nevada, US and is a high sulfidation epithermal project in Nevada’s Walker Lane.
The project area encompasses the northern margin of a 25 square kilometer zone of magmatic hydrothermal quartz alunite alteration that has been dismembered by post-mineral right lateral strike slip faults. The southeastern fault block is controlled by Fortitude Gold and hosts Nevada’s newest heap leach gold mine. The central block is less thoroughly explored and includes undrilled high grade outcropping gold on Orogen’s claims. In the west block the litho cap is well preserved and partially covered by shallow alluvial and post-mineral andesite cover. The following are potential targets:
- East Target – Orogen’s east target is focused on a 3 km long normal fault. The fault zone has illite altered granite in its footwall and quartz-alunite altered tuff in the hanging wall. The quartz-alunite altered tuff is consistently elevated in Au, Bi, As, Sb, and Sn. A large scree slope of altered boulders surrounds a small number of in-situ exposures with fine-grained ashy tuff horizons that consistently run > 2 g/t Au with 0.5 m chip channel samples up to 8 g/t Au and select samples to 12 g/t Au. No historic drilling, prospecting, or sampling is known from this area.
- West Target –Orogen’s west target is made up of ~8 km2 of low hills of quartz-alunite altered Singatse tuff surrounded by a shallow zone of post mineral alluvium. Southeast of the covered area, gold mineralization occurs in gold-barite veins cutting the quartz-alunite blanket. Northwest of the covered area a shallow east dipping ledge of quartz alunite altered tuff was explored in 1989 by FMC. Drilling successfully traced the ledge east under gravel and a fresh andesite, intercepting up to 35’ of 0.24 ppm Au within an ~100-foot-thick blanket of quartz-alunite alteration. A 2020 ground magnetics survey, completed by Renaissance Exploration Inc., defined multiple large magnetic lows which may be zones of more intense alteration associated feeder zones for the high sulfidation system. No modern exploration has been completed on the project.